Acyl glycine amides



Patented Aug. 24, 1948.

UNITED STATES PATENT OFFICE 1 1,447,587 Henry M31232: Switzerraarsmar M 4 Claims. (01. 280-561) This application is a continuation-in-part application to our copending patent application Ser. No. 510,402, filed November 15, 1943.

Heterocyclic as well as aromatic carboxylic acid amides have been described repeatedly as stimulants. icontrarily thereto the corresponding compounds oi the aliphatic series often show an opposite eflicacy. Thus, for instance, the isovalerianic acid diethylamide possesses a calming eflect (cf. Deutsche med. Wochenschriit 1901, No. 49); the methylethyl acetic acid diethyl amide also shows the same eflicacy (cf. Archiv der Pharmazie 1935, 202) a We have now surprisingly found that disubstituted amides of acylated aliphatic N-monoalkylor N-monocyclo-alkyl-amino carboxylic acids respectively possess valuable therapeutical properties. The said compounds may be prepared according to various methods.

For instance the said products may readily be recovered b acylating amino carboxylic acid amides which are N-monoalkylated or N-monocycloalkylated respectively. For the acylation the various carboxylic acids or their functional derivatives, such as the halides, esters and anhydrides, are suitable. Compounds which may be used for this purpose are, for instance, the following ones: acetic acid, propionic acid, butyric acid, isobutyric acid, crotonic acid, methyl propiolic acid, valerianic acid, a-butine-a-carboxylic acid, -y-butine-a-carboxylic acid, isovalerianic acid, trimethyl acetic acid, allyl acetic acid, um-dimethyl acrylic acid, fl:fi-dimethyl acrylic acid, capronic acid, isopropyl propiolic acid, tertiary butyl acetic acid, diethyl acetic acid, methyl-isopropyl acetic acid, sorbic acid, atfiifltrimethyl-acrylic acid and the like, moreover, the halides oi the carbonic acid, carbonic acid ester, carbonic acid amides, oxalic esteror oxamic acid halides and so on. Furthermore, there may be used halides oi aliphatic alkoxy or alkylmercapto acids respectively, such as ethoxy acetic acid, a-ethoxy propionic acid, a-methylmercapto proplonic acid, a-ethylmercapto propionic acid, a-propoxypropionic acid, a-isopropoxy propionic acid, a-methoxy butyric acid, a-methylmercapto butyric acid, u-ethoxy isobutyric acid. u-DlODOXY isobutyric acid, m-isopropoxy isobutyric acidand the like. Moreover, there come into question halides, esters or anhydrides of phenyl acetic 2 acid, 3:4-dimethoxy-cinnamic acid, anisic acid, veratric acid, trimethylether gallic acid, acetyl salicy-clic acid, hexahydrobenzoic acid, furanea-carboxylic acid, 'Y-pyranecarboxylic acid, 2:6- dimethyl dihydropyrane-3-carboxylic acid, dimethyl coumalic acid, pyridine-fl-carboxylic acid, pyrazine carboxylic acid, 3:5-dimethylisoxazol- 4-carboxylic acid and so forth.

As N-alkylated or N-cycloalkylated aminocarboxylic acid amides there come into consideration such ones of the ouseries as well as of the fl-series. The same may be obtained by interaction of aor- B-halogen carboxylic acid amides with primary aliphatic or primary cycloaliphatic amines, such as methylamine, ethylamine, propylamine, isopropylamine, allylamine, butyiamine, isobutylamine, secondary butyiamine, cyclopentylamine,

' methylaniline, methylbenzylamine, piperidine,

a-pipecoline, morpholine and so on.

A further kind suitable for the preparation of the claimed compounds consists in causing acyiated aliphatic N-alkylor N-cycloalkylamino carboxylic acids respectively or their functional derivatives being acylated by any suitable carboxylic acid to react with secondary amines; furthermore, the salts of the acylated aliphatic carboxylic acids can be interacted with carbamic acid halides deriving from secondary amines. Another way for the production of these compounds consists in causing monoalkyl amides or monocycloalkyl amides of suitable carboxylic acids to react with aliphatic aor p-halogen carboxylic acid amides, the amide groups of which being twice substituted. Finally, it is also possible to subsequently alkylate or cycloalkylate aliphatic amino carboxylic acid amides which are still acylated by suitable carboxylic acids and the amide groups of which still possess replaceable H-atoms (ci. Titherley, J. Chem. Soc. London 79, 391 (1901)).

The new compounds have been found to be good therapeutics, the same being especially used as analeptics; partly they are also suitable as anus? solving assistants. The new compounds can be used as such ones or even in mixture with each other.

The present invention will now be illustrated by the following examples, wherein the parts are by weight, unless otherwise stated. or course, this invention shall not be limited to the following examples.

llama: 1

81.6 parts of ethylamino acetic acid diethyl amide are dissolved in 100 parts by volume of benzene and, while cooling, 13.41 parts of diethyl acetic acid chloride are added. After some time the formed ethylamino acetic acid dlethyl amide hydrochloride is filtered oi! and the filtrate is freed from benzene. The dlethyl amide is dissolved in water and freed from any ethylamino acetic acid diethyl amide hydrochloride still present by shaking'with alkalis, e. g.. with potassium hydroxide. The remaining product is finally rectified in high vacuo. B. P. at 0.3 mm. pressure=134-136 C. It is miscible with water and with organicsolvents like ether. benzene, alcohol and so on, and has the following formula:

37.2 parts of lsobutylamino acetic acid diethylamide are dissolved in 100 parts by volume or benzene and under cooling and stirring 16.3 parts of diethyl oxamine acid chloride are dropwise added thereto. After a stirring for 2 hours the isobutylamino acetic acid diethyl amide hydrochloride thus formed is filtered by suction and the N-diethyl oxarninoyl isobutylamino acetic acid diethylamide is purified and distilled. as described in Example 1. Its boiling point at 0.16 mm. pressure amounts to 174-175 C. This product is miscible with water. alcohol, ether and the like.

Exulruil 81.2 parts of cyclohexylamino acetic acid diethyl amide are dissolved in 150 parts by volume of ether and, while stirring and cooling, the mixture is treated dropwise with 11 parts of diethyl oxamic acid chloride. Stirring is still continued for several hours, whereupon the whole is worked up. in the manner described in Example 1. Boiling point at 0.1 mm. pressur=200-203 0.; melting point 80-81 C. The substance is a little soluble in water and easily soluble in organic solvents.

0-H RPN-CHe-COJHR): cimncmcom C231 Cell 40 30:65.1 for the Examples 1 and 2. 0.01: R0=C2Hs for the Examples 3 to 14.

of the Table 1 are enumerated.

Table 1 No. B R B. P., mm. form solubility in: co -water. e-ether 1 0mm--. -c0cm 1aa=c.(o.1s) Solid,M.P.60-52C. 1n:mlsclble,e:misclble.

2 0,13. -;---do 12s=-c.(o.o5).- liqui Do.

a cm -410 us -141 0. (0.5)-"-.- --do Do.

4 can .-do 136-l370.(0.16).------...do Do.

CE: I '5 ca cocmc ne -111 0. (am n 130.

6 C;H|-.-. -...-do 1a2-1as O. (0.14)... do .L uneasily solublaneasily soluble 1-. -...-do coo-cm 124 0. (0.15 stunner-arc- Do.

CHI

CIHI a on cocfi 1ao-122c. o.orn-.- liquid w:miscible,e:misclble.

0. n cocomcmn, 1w-1o1c. o.1s\ do Do. 10 c,m----.. commune 139-140C.(0.83 n Do.

c1 n n -cocn=c 1s2-1sac. (om n w=solu le- OCH:

12-. co 00H, ms-21oc.(o.a) -.--do w=easily soluble, =easily soluble.

Tabla I-Continued Nu. R R B. P., mm. form solubility in: w==wator, e-ether i3 0,11; C 185-188 C. (0.25)..... liquid w-easiiy soluble, e-easlly soluble.

C 0 CH:

. 14 do CO(|) CH 2122i5 C. (0.5) solid, M. P. 105 0..-. Do.

CHib\ =0 0 l do C0C(I'J.CH; 170-l72 O. (0.6) solid, M. P. 74 0..... Do.

l6 CH: COCH1 195l9 C. (0.3) liquid w= soluble, e=easiiy soluble.

EXAMPLE 4 Further compounds having the general formula:

39.6 parts of a-methyiamino propionic acid diethyl amide are dissolved in parts by volume of benzene, then 13.4 parts of dimethyl carbamic acid chloride in 50 parts by volume of benzene are added thereto and the whole is heated in the and obtainable, when working in the manner described in this example, are enumerated in the autoclave during 3 hours to C. After 0001- following Table 2.

Table 2 No. R R B. P., mm. form solubility in: w==water, e=ether l GEL..- l03i05 C. (0.04)... to-:miscibie, e miscible.

3 CH; -COCH=OH.CH: 136-137 C. (0.07).... do Do.

4 03H! .-dc 117118 C. (0.015).... do Do.

5 do.. COCHaCH:CH:CH|.-.-.. 124l25 C. (0.17) d0 w==easily soluble, e=easiiy solubie,

CH: 6 do COCHzC 120i22 C. (0.4)."-.. do Do.

CHs

7 ..do ..-..do l35l38 C. (0.3) ....do will'ioderateiy soluble, e easily solu- 8 CH; -COCCHa 106108 C. (0.05) ..do w==easily soluble, c-easily soluble.

CHu

9 C H COG-CH; i08-il0 C. (0.25) do Do.

CH! 10 CH; COCHCCH; 119 C. (0.19) do Do,

11 C,H. do ll8i20 C. (0.2) do w=soiuble. s sciubie.

l2 CH; (3 OCH -C 132-134 C.(0.l5)... d0 w==easiiy soluble, e easiiy SOiklF'i Zz:

c1 13 do COCH|)CH:.CECH-- -l36 C. (0.l).-- i. .do w=miscible, e-miscible.

ing the separated hydrochloride is filtered 0t! and the compound is purified as described in Example 1. Boiling point at 0.15 mm. pressure=117 C. is miscible with water and organic solvents.

EXAMPLE 5 86 parts of a-ethylamino propionic acid diethyl amide (made according to the method described Table 8-0ontinued R No. N Ro B B. P., mm. form solubility in: w-wster, "other OCH;

41 Nwlm- C O CH=CH 008' 206-208 C. (0.4).-.. liquid w=|oluble, e=essily soluble.

43.. (In C l-1a2 0. (0 '4 do w=solublc, e=solubio.

mun: 8 7

31.8 parts of a-isopropylamino propionic acid 20 dimethyl amide (B. P. 15 mm. -92 C. prepared according to Example 1) are dissolved in ether and treated under stirring at 0 C. with 10.4 parts of crotonic acid chloride; then stirring of the mixture is continued for some hours at the cold,

25 whereupon the hydrochloride thus precipitated is filtered oil and the substance rectified in the high vacuo. Boiling point at 0.1 mm. pressure=121- 122 C; melting point 82-85 C. This product is easily soluble in water and organic solvents.

In the table 5 further compounds of the following general formula are enumerated CHICK-C ON(R)I CH:

OHICK-OON(R)I cmomommz' 85 are shown in the following table.

Table 4 No. R B B. P., mm. form solubility in: w-water, e-ether 1 CH: OOCH=CH.GH| l29 -l31 C. (0.1).-. liquid.-- w-easily soluble, c-easily soluble. 2 01K- (in l36-138 C. (0.25)... -..do..... ai -moderately soluble, e-easily soluble. a .-dc c0cB.cm 125 0. o m an w-solnbie, e-solubie.

. CIHI 4....-- CH: --COC;H 129-'132 C. (0 3) do w-easily soluble, e-eesily soluble.

5 COGH:CHICH: lm-129 O. (0.15)-- ---d0---- D0.

5 an -c00mrm,rnmm (P-142 O. (0.2)--- ...do---. Do.

. CHI 7 do COCH:C l28-l31 O. (0.15)-. ...do.-.. Do.

OHI

CH. 8. ..do C0OCH 122-l26 C. (0.24)... ...do.... Do.

\CHI

CH: 9 ..do -COCH=C 182 C. (0.15) ...d0.--- D0.

OH: 10 do --COC=C 138l41 C. (0.3).... ...do.... Do.

H: CHt

Cl 11 do COCH'=C lm'-l22 C. (0.1).... --.do---- icy-moderately soluble, "easily on soluble.

. i Table No. R R B. P.. mm. iorm solubility in: w-water, e-ether 1 cm. cocm 113 0. 0.04) liquid... w-aoluble, e-soluble.

2 .do C OCH=CELCH1 138 C. (0.02) waxy Do.

CH: 3 .-do C 0CH=C 142-l44 C. (0.26) liquid-.. w-little soluble, e-easilv soluble.

4 OH; -C0CH.C i 13l-133 C. (0.2)...- do--. w-soluble, e-soluble.

Exmtx 8 is mentioned in Example 1, boiling at 12 mm. pres- 27.6 parts of a-allylamino propionic acid diethyl amide (made according to Example 1, boiling point at 12 mm. pressure =127129 C.) are dissolved in parts by volume of ether and dropwise treated with 8 parts of isovalerianic acid chloride under cooling. The working up is car ried out like that of Example 1; boiling point at 0.06 mm. pressure 118-120 C. This product is moderately soluble in water, but easily soluble in ether.

In the Table 6 further compounds of the following general formula are mentioned.

CH:.CHCON(R):

sure at -130 C. and miscible with water and organic solvents) are dissolved in parts by volume of dry ether. Then, while stirring and cooling, 11.8 parts oi. dimethyi acroyl chloride are dropped thereinto. After some time there is illtered and worked up. Boiling point at 0.07 mm.

pressure ism-142 C.

This product is moderately soluble in water,

but easily soluble in organic solvents.

Cum -NJ! 130 Table 6 No. R R B. P., mm. form solubility in: w==water, wether 1 CH1 COCH: 0I{.CH; l27l28 C. (0.05).-- liquid... w=easily soluble, e=easily soluble. 2 01H; do 13a" c. (0.03) -..do Do. 8 CH; C0CH,CH ClEl;CH; 120l2l C. (0.1).-.- --do. Do.

v/ gCHa 4 do -00CH,C 122-i24 C. (0.27)..- -.-do.- Do.

CB; 5 .110 -cocn=o l22124 c. 0.1 do.. Do.

0 01H; ..do 13l132C. (0.15).-- do--- Do.

7 do CO.OON(C1H5): 1009- 0. (0.08)..- ..dow==soluble, e-soluble.

Exmm 9 40 parts of a-n-butylamino propionic acid diethyl amide (made according to the method Further compounds according to the following general formula are enumerated in the Table '7.

CHsCH.CON(R)z CHiCHaCHrCHzNJl' Table 7 No. R R B. P., mm. form solubility in: w==water, c=ether 1 CH| C0CH=CH.CH1 135l37 C. (0.12)..- liquid... w casily soluble.e-=easily soluble.

. do 14l-l43 C. (0.13)... .do w=glioderately soluble, u easily so]- u e. /CH1 3 CH CH;CH 126-l27 C. (0.1).... ...do... w easily soluble, e-easily soluble.

4 0 H; CO.CON(CH;)1 l82 C. (0.35)... ...do w-scluble,e s0luble.

6 CH; CO.CONH(C1H;); l80182 C. (0.35)... do..... w==easily soluble, e-easily soluble.

6 Gril CO.CON(C;H;), 164-166 C. (0.08).-- do... w-glloderately soluble, e easily sol- 7 CH; COCHr 134 C. (0.22) do w-soluble,e=soluble.

acid diethyl amide (made according to Example 1; boiling point at 11 mm. pressure=112-115 (3.,

miscible with water and organic solvents) are 5 dissolved in 150 parts by volume oi. ether and then a parts of dimethyl acryi chloride are added dropwise under cooling and stirring. The working up and purification takes place analogously to E:- ample 1; boiling point at 0.3 mm. pressure=135- 1 16 amino propionic acid dimethyl amide boiling at 0.2 mm. pressure at 169-171 C. The substance thus obtained is easily soluble in water and in organic solvents.

Further compounds of the general formula cmcmcomnh CH:

0 are identified in Table 8.

Table 8 No. R R B. P., mm. ionn solubility in: aa-water, s-etber 1 CE: COCH=CH-CH| 144-l40 C.|(0.6)...- liquid... w-easilysoluble,e-easilysoluble.

GHr do -cocmo 129l3l 0.01.25)..- do Do.

3 -.do COCH=C IMP-151C.(0.46).. do' Do.

0.11.. -coc0N(o.H.). 115-171o.'(o.2) "410--.. w-gliodetately soluble. e-easily sol- 137 C. This compound is soluble in water and Exams: 11

easily soluble in ether.

Exmu 1011 0.1 mm. pressure at ma -1c: c. and is moderately soluble in water and easily soluble in organic solvents.

when starting from a-cyclopentylamino propionic acid dimethyi amide, one obtains in an 34.3 parts of fl-ethylamino propionic acid diacid diethyl amide, of. Example 1; boiling point at 13 mm. pressure=124-12'l' C., miscible with water and organic solvents) are dissolved in 100 parts by volume of toluene; then, while well cool 35 ing, 12 parts of trimethyl acetic acid chloride are added dropwise and the whole is stirred for some time at room temperature. The working up is carried out in an analogous manner to that described in Example 1; boiling point at 0.17 mm. The final product is easily soluble in water and in organic solvents.

The following Table 9 contains further compounds according to the general formula analogous manner N-propionyl-a-cyclopentyl- 45 g,

Table 9 No. R R B. P., mm. form solubility in: w-wster, e-ether l CgH; COCH=CH.CH;. 100 C. (0.07) liquid... w=easily soluble, e=sasily soluble.

2 CHI-CHFCHI. CH: l55-156 C. (0.08)... ...do..... w=1noderately soluble. e=easiiy soluble. C 0 C310 8 05B: CH: 149-160 0. (0.1)-.. .60... w=easily solnble,e=easily soluble.

4 03H. 00.0 ON(C3H|): 166 0. (0.07) do Do.

8 ..do 00H; nor-210 C. (0.08)... ...do-...-. w=10% soluble, masiiy soluble.

C0 OCH:

6... do ZIP-211 C. (0.45)--- -.-do....- Do.

CBaCOO 1 (In G 178-180 O. (0.21)... ...do..... w=oasily soluble, c=oasily soluble.

' Y -N I do COC 13.031 184-185 O. (0.18)..- -..do.... Do.

CEi(

17 Exam 12 27.8 parts rl p-allylamino propionic acid diethyl amide (made in the manner described in Example 1, B. P. 12 mm. l2'7-130 C., miscible with water and organic solvents) are dissolved in ether and treated below C. with 8 parts of dimethyl acroyi chloridef The purification and working up is carried out, as described in Example 1, the final product boiling then at 140-143 0., when distilled at a pressure of 0.2 mm., and being moderately soluble in water and easily soluble in organic solvents.

Iihe analogously prepared N-diethyl oxamic acid compound possesses the boiling point 168- 169 C. at 0.12 mm. pressure.

stirring and cooling with 23;

1 1a l, boiling point at 12 mm. "prs'siir -lilfi 08- (3.. miscible with water an r-organic sblventsl are dissolved in ether. while addihg fio' 'parts by' volume of dry pyridine, and t'reated drdpwisenhder partsoi' dimthyl acroyl chloride. Aitertii'eflltratioii bt th' byridine hydrochloride the filtrate is purified and rectified in the high vacuo, as described in Example 1. Boiling point,-at 0.15 mm. pressure: 120-122 0.; soluble in water and organic solvents.

Compo ds of the generaljprmula R crucmcmcorK v01mm Bo are mentioned in the'i'ollowinfitable.

amide acylated by means of isovalerianic acid ethyl amide (preparation according to Example Table 10 B No. N/ n B. 2.. mm. iorm solubilityin: w-wm -athu 1 mom -cocn=cn.cm 1s2-1a4=o.(o.oa)... liquid..- ia=ieasiiy$1uma e=easily soluble.

2...... N/ 120-1220.(0.06) ..-..do-.-.- g1)...

CzHi i a manag an raw-13o 040.09 A Do.

, CH: 4... ncocfi 121"-12sc. om n I ,i =r c =mmims. cm

. OH: I 5.--.-- mom), ccomc 111-119 c. (0.01\ an w=ieesilysoiub1s, e=easilysoluble.

CH cm 6 N o 111-113Q (004) in ul'k OaHs m 1 mom), cocmc n1 -122c.(om c iqg l qderetely soluble, e=easily sol- CH;- 7 s; a moms. COCH=O/ m-1ao'c.(o. z n 3 Do.

CHI ?rs.i..,sl 9 N(C|H5)| 000 011. 110-ll20. (0.2m do w =jsoluble,e=easilysoluble.

CH W153 1o -410 -cocn=c 1a4c. o.1s\ 7 v =;litt les ol uble,e=easilysoluble.

c E 11 do cocomcmo, l58l59C.(0.16)-.- ...do---- ic =easilysolublae=easilysolubla mm 12 1 (-003, m3-205c.(0.0s)--. ---do'..'-- w1'= little-soiuble,o=easilysoluble.

CH 1.. 1a---.- mom), -c0-c 159-1coc.(o.a5)-.- "410.... pc 1 7 i CHgClIgCH; V

The p-allylamino propionic acid dimethyl 31.6 parts of a-ethylamino butyric acid dimethyl amide, boiling point at 12 mm. pressure=100-101 C., miscible with water and organic solvents. are dissolved in 200 parts by volume of ether, whereupon 12 parts of isovalerianic drochloride is filtered off and the reaction product purified and fractionated in high vaouo in mm. pressure and is easily soluble in water and organic solvents.

,The Table i1 contains further compounds according to the general formula the manner described in Example 1. The final 5 cmcnicmc product has the boiling point 121-124 c. at 0.1 CECE Table 11 No. B B. 2., mm. iorm solubility in: v-wotu. enthu- 1 40011. HIP-127 0.016).-.. liquid w-eosilysolubio,-oosilyso1ublo. 2 OOOH:OH;.....-- 124-126 0. (0.45)-.. -do Do.

3 COOH OE|OHa 117 (0.2) do.- Do.

4 COCH=OH.CH1.. lav-1w 0. (0.08)... ...do Do.

OH: 5-....." COC JON-102 C. (0.25)... -..do Do.

CHI

6 cowg yrm. 135 -129 0, (o it do w=aolnblo.

CH1 7-----.- C 0 CH=G 128 C. (0.1).-. an w=oaslly soluble, e=oasily soluble.

CH1 8 COGCH; 134-l36 O. (0.55).-. do 130- 9 COCH;CH:CH:CH;CH;...-.. l%l28 O. (0.03)--. -.-do w g zgdcmtely soluble, a=o aaily so]- 10 C 0 CH=CECH=GH.CH;--.- 146 0. (0.36) waxy w=littlo soluble, c=aolublo.

CE: I 41 ecoo 1342? O.'.(0.02). iiquid w gdemtely soluble, e=usily soi- CsHI CH I 12..-... C OCH C 1844? O. (0 l do w=so1uble, masily soluble.

CIHI

I CH;

13 -COCH;CCH: 122-i24 C. (0.08)-.. ..do- Do.

14,"... CH; CHI 126' O. (0.2) ...d.o-... moluble. 6401111716.

16--.-.. CH: CH| l25-l26 O. (0.17 do w=easily soluble. moosfly soluble.

16 CO(CH1)|CH1 l32-134 O. (0.2)...- --.do w=aoluble. c=soluble. l7 C0.CON(C1Hi)| l55 C. (0.1) do.-.-- w=miscible. miscible. 18 CH; l31-133 O. (0.09)..- ..do w=solublo, z=easily soluble.

cocn=c 10 -C 0 CECE; 124 C. (0.1) d w=easily soluble, e=oasily soluble.

31...... C OCH-CHlClh l25-12fl C. (0.1) do Do.

CHI

21 COCH.CH| i32-134 C. (0 2 do Do.

CHsCHaCHi 22..--.- C 0CH.CH| l32133 C. (0.03) in D0.

CH: CH

Table 11-Continued No. R B. P., mm. form solubility in: w-water, c-ether #8 COCH.C;H l43-145 O. (0.3).-.. liquld.-.-. w-eully soluble, c-ees ily soluble.

.Cfll V a -cocn.cm 140-145 0. (0.1 nw=soluble, #1010010.

25 -OH.CE1 150 0. (0.17) .do--..... moderately soluble, c=easily sol- I J m uble. O00B.CH:OH: 100 102? O. (0.4)..-. ..do mlittle soluble, c=easily soluble.

CHr-CH,\ 27 O00 0 157 0. (0.13 do w=easily soluble, c=easily soluble.

CHrCHa I -OOOE0.0H| IMP-141 O. (0.85)... -.do--.-.-- Do.

2 -G00 l84-136 O. (0.1).... ..do.-...... w=soluble, a =soluble.

CH0 lcmcmcm 2 r 0.1:- 15 described in Eaample 1. After a repeated dis- 872 parts of m-ethylamino-n-butyric acid diethyl amide (preparation according to Example 1; boiling point 15 mm. pressure=111-l14 C.; miscible with water and organic solvents) are dissolved in 1000 parts by volume of absolute ether, then the mixture is well cooled and treated tillatlon in high vacuo (boiling point 165-168 C. at 0.07 mm. pressure) an almost colourless oil is obtained which is readily soluble in water and organic solvents.

The tollowing table 12 shows an enumeration of v further compounds according to the general dropwise under 5011112 3 with 163.5 parts of di- R ethyl oxarnic acid chiczide. After astirring for 2 1/ hours the ethylamino butyrlc acid diethyl amide 0111011001100. hydrochloride is filtered 08 and purified, as cmomnn" R0 Table 12 solubility in: w weter No. N R R B. P.,mm. form ether 4 l. N(C;H 00 0. liquid w=misclble, c=misclble.

1i Nmmm do 124 0. .....do M odezatel soluble. e=

(0.05). I easily solub e.

3 N(CsH|)a COOHgOH; 115C. (0.1). .....do w=misclble, miscible.

CH5 4 N COCH;CH;CH1 120-127 0. .-....do w=soluble,e-soluble.

(3:35 GHQCHK 5 N 0 -....do l-l42 0. .....do...... w-easily so1uble, c-easily (0.11). soluble.

CHCIh CH; 6 N COCH=CH.CH: li6-ll8 0. .....do...... Do.

7 N(CzH )a. COCH=CH.CH;. 1303-35390. .....do....... Do.

I NU COCH=CH.CH;. IMP-132C. -....d0 w-modemtely soluble,

(0.1). easily soluble. CHPCHK 9 O n l-158 0. .....do...... w-easlly soluble, e easily CH CH (0.04). soluble.

10--.-. N(C;H 00011 12 5 0. .....d0 w-misclble,c-=miscible.

CE: I I

11 in COCHsCHsCHsCHI IMP-126 0. .....do.. w-moderately soluble,

(0.1). mily soluble.

Table Iii-Continued No. R B. P.. mm. form solubility in: w-wator. e-ether 4.. CH| CCH1 28-l30 C. (0.2)..-. liquid--. w=easily soluble, e=easily soluble.

6 .-d0...-. OOCHgCHgCH| 140-143 O. (0.35) (in Do.

4 CH; 6 GEL.-- -COC 118 C. (0.16) ....do--... Do.

1 \T /CH. 7 .-do-...- COCCH: 128 C. (0.2).-.....-. -..do Do.

EXAMPLI 17 30 parts of a-isopropylamino-n-butyric acid diethyl amide (preparation in an analogous manner to that described in Example 1; boiling point sure of 12 mm. and being a little soluble in water at mm. pressure=120-124 0., miscible with water and organic solvents) are dissolved in having the boiling point 01 123-l26 C. at a pres- CH;CH:CH.C ON(R):

CHN-R' may be produced according to Example 17.

Table 14 No. [R IR B. P., mm. form solubility in: w-water, e-ether 1 CH: -1 COCH: 120-121 C. (0.1).-. solid, M.P.7778 0-. w-easily soluble, c-easily soluble. I 2 do C0CH1CH:CH: 126-127 C. (0.01).-. solid, M.P. 46-47 0. Do.

3 .--do COCH=CH.CH: 130 C. (0.04) solid, M. P. 86-88 C. Do.

4 0-H- dn 123-l25 C. (0.15).-. liquid w-moderately soluble, e -eesily soluble.

5 do CO.CON(CzHi)a ll52 C. (0.25)--- do Do. B CH; -C0 CECE: 124-125 0. (0.1) do w-easily soluble, e-easily soluhle.

7 do- COCH.C:H; 1Zil25 C. (0.2) do Do.

8 Cili C 00 170 C. (0.25) solid. M. P. 7778 0. Do.

9 GEL-.- -COC|H| 126 C. (0.3)- lirmid w-solublme-solul' le.

Exam 18 carried out, as mentioned in Example 1, where- 29.7 parts of a-allylamino-n-butyric acid diethyl amide (preparation according to Example 1; boiling point at 13 mm. pressure128-130 C.; miscible with water and organic solvents) are dissolved in dry ether and then, while coolupon the product is rectified in high, vacuo; boiling point at 0.22 mm. pressure=171-173 C.,

soluble in water and organic solvents.

Further compounds of the following general formula are enumerated in the Table 15.

ing, 11 parts of diethyl oxamic acid chloride are CHiGHfiH-CONGW caused to drop thereinto. The working up is 6 n cncmNn' Table 15 No. R P. B. P., mm. form solubility in: w-water, e-ether COCH; C. (0-1) liquid-.. w=soluble, c=soluble.

C 0 CH CH: 114-116 C. (0.1).... ...do Do.

COCH;CH;CH: 120-122 C. (0.25)-.. ---do.-. Do. -COCH=CH.CH:. ..L na -134 c. (0.2)..-. ..-do.-.- Do.

6 cm. .-d0 138140 C. (0-2)...- -..do-- w=moderetely soluble, a=solnble.

6 CH, -OOCB -117 C. (0.18)... ...do 03 1011111118, e=soluble.

7 --do -COCH;CH:CH:CH| 111 139 C. (0.17)... ...do.... w=moderately soluble, c=soluble.

9 Table -Continued No. R R 13. 39., mm. form solubility in: w-water,c-ether CH: e um cocH,cH lav-127' 0. (0.25)... liquid..- w-modmtely mlubl -loiuble.

9 n --c 0 cn=c 122-124 c. (o in do w=so1ub1e, Humble.

CH; 10..... ..--.do -c00=O 135' c. (o m n w=modarately soluble,c=solnble.

I Hi \CH; 11 ..do 420011.011: l32-l33 c. 0.15 "410---. w=soluble, e=soinble.

12;.-. ..-.-d0 COCH.CH| raw-132 o. (0.08 --.do Do.

CHI

Exnm'u: 19 C.) are dissolved in ether and, while stirring and 33 parts of a-n-butylamino-n-butyrie acid dicooling, 7.8 parts of acetyl chloride are slowly ethyl amide (made analogously to Example 1; added thereto. The working up corresponds to boiling point at 13 mm. pressure='135-138 0., soluble in water and organic solvents) are dissolved in ether and treated under cooling with 11 parts of diethyl oxamic acid chloride. Then the mixture is worked up in an analogous manner to that described in Example 1, the final product having the boiling point 164-166 C. at 0.08 mm. pressure and being moderately soluble in Water and easily soluble in organic solvents.

Further compounds according to the general 40 Suits formula CH|CH|CH.CON(R)2 CHICHICHQCH]N.RI

are shown in the following Table 16.

that of Example 1. The final product has the boiling point 11'7-118 C. at 0.01 mm. pressure and is easily soluble in water as well as in organic solvents,

11?, instead of acetyl chloride, crotonic acid chloride is used, a product is obtained boiling at l26-12'7 C. at a pressure of 0.01 mm. and melting at 69-'70 C.

When using propionic acid chloride, there re- N-propionyl-a-secondary-butylamino butyric acid dimethyl amide, B. P. at 0.21 mm.= 129-131 C.

Exmu 21 31.6 parts of fi-ethylamino butyric acid dimeth- Table 16 No. R R B. P., mm. form a lg z' 1 cm..- -cocm 121-122o. (0.1s). liquid w-soiublc,e-soluble.

2 -do---- -c0cn=cn.cm.-.- 135C. (0.1 ..do.... Do.

3 -.-do---. COCHzCH -l28 O. (0.1)---. --do. w-soluble,c-easily soluble.

4 do COCH=C IMP-141C. (0.15)...-do. Do.

5 C1115...C0CON(CH;)1- 156C. (0.0s .--..do.-- w=soluble,e-soluhle.

o cm--- co.coN c,H=), 180-182O. (0.45) ..-do. Do.

7.-. "110.--. COCH.CH; C. (0.12) --do.-- Do.

a. do -cocH.c,Hi 12s-1a0 c. (0.1).----do.--. Do.

a. do -coc,m HEP-145C. (0.25)- --do- Do.

EXAMPLE 20 105-106 C., miscible with water and organic 57.2 parts of a-secondary butylamino butyric acid dimethyl amide (made analogously to Exsoivents) are dissolved in parts of ether and while stirring and cooling, 10.4 parts of crotonic ample 1; boiling point at 13 mm. pressure=112 75 acid chloride are caused to drop thereinto. After Exumu: 22

37.2 parts of ethylamino isobutyric acid diethyl amide (prepared from oz-bI'OinOlSOblltYllC acid diethylamide with ethylamine according to the indications made in Example 1; boiling point at 13 mm. pressure=115-118 0., miscible with water and organic solvents) are dissolved in 200 parts by volume of absolute benzene and, while stirring and cooling, 10.6 parts of isobutyric acid chloride are caused to drop thereinto. After a certain time there is filtered and worked up, as described in Example 1, the final product having the boiling-point 132-133 C. at 0.1 mm. pressure and being easily soluble in water and organic solvents.

II, instead of a-ethylamino butyric acid dlethyl amide, there will be used a-ethylamino methyl ethyl acetic acid dimethyl a'mide having the boiling point of 118-120 C. at 13 mm. pressure (made from a-bromo'methylethyl acetic acid dimethyl amide by interaction with ethylamine, as described in Example 1), N-isobutyryl-a-ethyiamino methyl ethyl acetic acid dimethylamide boiling at 0.5 mm. .pressure at l28-130 C. is obtained; it is easily soluble in water as well 'as in organic solvents.

The following Table 17 contains some further 32 propionyl-a-propylamino-n-valerlanic acid dimethyl amide, B. P. at 0.25 mm. 141-142 C., and N acetyl a propylamino-n-valerianic acid dimethyl amide, B. P. at 0.15 mm, 120-122 0.; both these compounds can be intermixed with water and with organic solvents.

Emu: 24

30 parts oi a-ethylamino isovalerianic acid diethyl amide, which can be produced according to the indications made in Example 1 and boiling at 108-110 C. at a pressure of 12 mm., are dissolved in 150 parts by volume of benzene, then treated under stirring and cooling with 11 parts of diethyl oxamic acid chloride, whereupon stirring is continued for some time. After theusual working up the new compound is obtained, the same having the boiling point 150-152 .0. at 0.12 mm. pressure and being soluble in water to about 5 per cent, but easily soluble in ether;

When starting. from a-methyiamino isovaler ianic acid diethyl amide, a solid body melting at 68-69 C. and boiling at 152-153 C. at 0.1 mm. pressure is obtained, the same being soluble in water-to about 5 per cent and readily soluble in organic solvents.

From a-ethylamino isovalerlanic acid dimethyl amide there may be obtained, by means of acetyl chloride in ether, N-acetyl-a-ethylamino isovalerianic acid dimethyl amide, boiling point 94 C. at 0.01 mm. pressure and easily solubl in water as well as in organic solvents; by means of crotonic acid chloride there results the N-crotonyl a ethylamino isovalerianie acid dimethyl compounds of a similar constitution according to amide, boiling point at 0,05 mm, pressure=l22- the fo 124" C., this compound being also easily soluble in CH. water and in organic solvents.

From a-propylamino isovalerianic acid di- C.C N( :Hlli methyl amide may be obtainedin an analogous c manner the following compounds: N-acetyl-a; 01H! 3 propylamino isovalerianic acid dimethyl amide,

Table 17 No. R B. P., mm. form zlgg g 1.. COCON(CIH)1. logpm 0. liquid. w=miscible, miscible.

175 C. (0.3)..- ...do... Do.

210 C. (0.15)-. ...do. w=imi1y soluble, e=easily sol- Exmrn 23 30 parts of a-ethylamino-n-valerianic acid diethyl amide (made in the usual manner, boiling point at 12 mm. pressure=121-124 C., solublev in water and organic solvents) are dissolved in 150 parts by volume of ether and then 5.2 parts of acetyl chloride are dropwise added thereto by cooling. The boiling point of the final product after-purification is 125-126 C. at 0.15 mm. pressure; this product is moderately soluble in water and easily soluble in ether.

B. P. 0.2 mm. -117 0., soluble in water and in ether; N-propionyl-a-propylamino isovalerianic acid dimethyl amide, B. P. 0.1 mm 1-13-115 C., soluble in water and in ether; N-crotonyl-apropylamino isovalerianic acid dimethyl amide, B. P. 0.1 mm. -132 0., soluble in water and in ether.

Further compounds of this group according tothe general formula cmomonionoo'mmi oi...

In an analogous manner may be obtained N- 75 are enumerated in the following Table 18.

Table 1a solubility in: w=water No. R R R" B. P., mm. lorm "mum,

1 CH, COCH,CH;CH;.... C,H IMP-120C. (0.015).... liquid... wmoluble,e=soluble. 2 ...d0... COCH=CH.CH3 ...d0... 130 C; (0.08) .-.do Do.

/CH| 3 do COCH CH .do... 130-132 C. (0.2) do...-. Do.

4 .-.do. COCH=C ...do- 139l41 C. (0.25) .do.. Do.

5 0 H," .....do CB3" l45-146 C.(0.3) do..... w=moderately soluble, e=

easily soluble.

6 ..do G0.C0N(CH5)|... do.. l78-l80 C. (0.4) do..- w=soluble,c=soluble. 7 do ...do 01H, l80181 C. (0.2) ..-do. w=glloderately soluble, e=sol- 8 CH," COCH.CH: do.. l35l37 C. (0.1) ..do. wqoluble,e=soluble.

EXAMPLE 25 sure=134-135 C., soluble in water and organic 34.4 parts of fi-ethylamino isovalerianic acid dimethyl amide (boiling point at 12 mm. pressure=l07-110 C.; miscible with water and organic solvents) are dissolved in 200 parts of toluene and dropwise treated below 0 C. with 12 parts of dimethyl acroyl chloride. The working up is carried out in the usual manner. Thus, the new compound havin the boiling point of 130- l3l C. at 0.3 mm. pressure is obtained in a good yield; it is easily soluble in water and'organic solvents.

When starting from fi-ethylamino-fi-methyl- AS-ethyl propionic acid'dimethyl amide and crotonic acid chloride, there will correspondingly be solvents) are dissolved in 150 parts by volume of ether and, while cooling, treated dropwlse with 8 parts of isovalerianic acid chloride. After purification the body boils at 126128 C., when distilled at a pressure of 0.1 mm., it is soluble in water as well as in organic solvents.

By interaction of u-propylamino capronic acid dimethyl amide with acetyl chloride there is obtained in an analogous manner a product boiling at a pressure of 0.28 mm. at 141-144 C. and being soluble in water and in organic solvents.

The following I'able 19 contains further compounds of the general formula obtained a product boiling at 0.3 mm. pressure at 40 H Table 19 No. R R R" s. P., mm. lorm f jgg 'f on, 1 0111 COCH=C/ CHL. l44145 G. (0.2) liquld willttle soluble, e=easily so1u- CH; 2 1 .do COCmCH C|H 135l38G. (0.3 ..do. Do.

CHa

CH: 3 on," COCH=C ---do-- 14o-141 o. (0.1)...... ..do w=soluble,e=scluble.

4 "410.- coo=c ...do-- 143 -150 0. 0.5 .do-.... Do.

H, CH;

5 .d0.- C0.CON(C2Hs)a d0- IMP-192 C. (.45) ..do Do. a .do-. 00GB! cl0.. -122 0. 0.14 ...do Do. 1 ...do 00011.03, CH.-- 140 142" 0. 0.25 ...do--.. Do.

8 d0-- I B caHau C. (0.2) d0. D0-

135" C. and being soluble in water and organic 70 Exmu: 27

solvents.

EXAMPLE 26 32.1 parts of a-ethylamino-n-capronic acid 40 parts of a-ethylamino oenanthylic acid dimethyl amide (boiling point at 12 mm. pressure=128-130 C., miscible with water and organic solvents) are dissolved in 200 parts by volume of ether and, while stirring and cooling,

7.8 parts of acetyl chloride are dropwise added Exmn: 28

195 parts of a-bromo-n-butyric acid ethyl ester are heated in the autoclave for 6 hours to 80 C. with an excess of ethylamine in 200 parts by volume of absolute benzene. Ethylamine hydrochloride thus precipitated is filtered on, while the filtrate is distilled. The boiling point of the resulting product at 30 mm. pressure amounts to 88-90 C.

79.5 parts of the ethylamino-n-butyric acid ester thus obtained are dissolved in 200 parts by volume of dry ether, then under thorough cooling, 30 parts of isovalerianic acid chloride are dropwise added thereto and the whole is stirred during several hours at room. temperature. Then ethylamino-n-butyric acid ester hydrochloride is filtered off, whereupon the ether is removed from the filtrate. Finally, the latter is distilled. The boiling point of the resulting product is 125- 128 C. at a pressure of 0.6 mm.

81 parts of N-isovaleroyl-a-ethylamino-n-butyric acid ester are boiled for 2 hours under reflux with 20 parts of caustic soda lye in 200 parts by volume of alcohol. After having added water the alcohol is removedand the filtrate is repeatedly'shaken with ether, thenmade acid to Congo and the acid taken up' into ether. Now, the ether is removed by distillation, the acid is treated with phosphorus pentachloride, the mixture stirred for some time at room temperature and finally heated to 50 C., whereupon the phosphorus oxychloride is distilled d. The residue, being the raw acid chloride, is taken up in ether and dropwise added in the cold to an ethereal solution of diethylamine. After filtration of the diethylamine hydrochloride there is worked up in the manner described in Example 1. The boiling point of the final product is 120-122 C. at a pressure of 0.15 mm. This compound is somewhat soluble in water and easily soluble in organic solvents.

The same compound may also be obtained in a more advantageous manner, when starting from the a-ethylamino butyric acid diethyl amide and isovalerianic acid chloride.

Exmns 29 31.6 parts of e-aminobutyric acid diethyl amide (boiling point at 12 mm. pressure=109-11l 0., miscible with water and organic solvents) are dissolved in 200 parts by volume of ether and, while stirring and cooling, 10.6 parts of n-butyric acid chloride are caused to drop thereinto. After stirring for several hours the resulting precipitation is filtered oil, the filtrate freed from the ether and distilled in high vacuo. This product has the boiling point of 180-182 C. at 0.2 mm. pressure.

22.8 parts of N-n-butyroyl-a-aminobutyric acid diethyl amide are heated to boiling in xylene with 4 parts of sodium amide, whereupon the mixture is cooled, treated with an excess of ethyl iodide and heated in the autoclave until completion of the reaction. The sodium iodide thus formed is eliminated and the filtrate rectified in high vacuo. Boiling point of the resulting product at 0.1 m

pressure=124-126 C.; it is moderately soluble in water and easily soluble in organic solvents.

n-Butyroyl-a-aminobutyric acid amide can be triethylated in the same manner. Thus the same final compound is obtained. The same compound may also be prepared according to the method described in Example 1.

What we claim is:

1. An acylated aliphatic aminocarboxylic acid amide corresponding to the formula wherein Am stands for a radical of a secondary amine selected from the group consisting of lower alkyl Gila-Cs: N and N on, lower alkyl CHz-Cl XCO stands for an acyl radical of a carboxylic acid selected from the group consisting of aliphatic and cycloaliphatic carboxyllc acids with at most 7 carbon atoms, Y stands for a member selected from the group consisting of methyl, ethyl, propyl, butyl, allyl, cyclopentyl and cyclohexyl radicals, and Z stands for lower alkyl.

2. The acylated aliphatic aminocarboxylic acid amide of the formula CHI-CHPCH:

being a colorless liquid of the boiling point 1H being a colorless liquid of the boiling point 132-134 C. at 0.03 mm.

HENRY MARTIN. HANS GYSIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 697,730 Liebrecht Apr. 15, 1902 1,713,822 Dox May 21, 1929 1,886,481 Hartmann Nov. 8, 1932 2,084,626 Tabern June 22, 1937 2,115,681 Hofler Apr. 26, 1938 2,126,329 Hofier Aug. 9, 1938 2,188,244 Langlois Jan. 23, 1940 2,310,168 Carlson Feb. 2, 1943 2,388,154 Katzman Oct. 30, 1945 FOREIGN PATENTS Number Country Date 129,967 Germany Apr. 21, 1902 98,236 Sweden Jan. 3, 1940 OTHER REFERENCES Granacher, Helv. Chim. Acta" (1925), vol. 8, pages 211 to 217.

Granacher et al., Helv. Chimica Reta, pages 873 to 883 (1925), vol. 8. 

